#MathGraph

javascript と canvas を使って 数学のグラフを表示するページ。

This is the file to draw graphs with javascript and HTML5.
You can use in offline because this is consisted by only one html file.

##Feature Explicit Function
Parametric Function

##Future Implicit Function
Locus
Polar Coordinates
3-dimentional graph

Generate Math equation from input value (入力値からの数式生成)

Using javascript which was output from http://jscc.phorward-software.com/jscc/jscc.html with the following input.
下の定義を使って http://jscc.phorward-software.com/jscc/jscc.html から出力したコードを使う。

/~ --- Token definitions --- ~/

/~ Characters to be ignored ~/
!   ' |\t' ;

/~ Non-associative tokens ~/
    '\('
    '\)'
    '\{'
    '\}'
    '\['
    '\]'
    '\|'
    '\x'                            X
    '[0-9]+'                        INT   [* %match = parseInt( %match ); *]
    '[0-9]+\.[0-9]*|[0-9]*\.[0-9]+' FLOAT [* %match = parseFloat( %match ); *]
    'pi'                            PI
    'e'                             E
    'arcsin'
    'arccos'
    'arctan'
    'sin'
    'cos'
    'tan'
    'log'
    'exp'
    ;

/~ Left-associative tokens, lowest precedence ~/
<  '\+'
   '\-';

<  '\*'
   '/';

< 'arcsin'
  'arccos'
  'arctan'
  'sin'
  'cos'
  'tan'
  'log'
  'exp';

>  '^'
   '\*\*';

##

/~ --- Grammar specification --- ~/

p:      f              [* alert( %1 ); *]
        ;

f:      f '+' f        [* %% = %1.toString() + '+' + %3.toString(); *]
        | f '-' f      [* %% = %1.toString() + '-' + %3.toString(); *]
        | f '*' f      [* %% = %1.toString() + '*' + %3.toString(); *]
        | f f          [* %% = %1.toString() + '*' + %2.toString(); *]
        | f '/' f      [* %% = %1.toString() + '/' + %3.toString(); *]
        | '-' f &'*'   [* %% = '(-1)*' + %2.toString(); *]
        | '\[' f '\]'  [* %% = 'Math.floor(' + %2.toString() + ')'; *]
        | '{' f '}'    [* %% = '(' + %2.toString() + ')'; *]
        | '(' f ')'    [* %% = '(' + %2.toString() + ')'; *]
        | f '^' f      [* %% = 'Math.pow(' + %1.toString() + ',' + %3.toString() + ')'; *]
        | f '\*\*' f   [* %% = 'Math.pow(' + %1.toString() + ',' + %3.toString() + ')'; *]
        | '|' f '|'    [* %% = 'Math.abs(' + %2.toString() + ')'; *]
        | 'arcsin' f   [* %% = 'Math.asin(' + %2.toString() + ')'; *]
        | 'arccos' f   [* %% = 'Math.acos(' + %2.toString() + ')'; *]
        | 'arctan' f   [* %% = 'Math.atan(' + %2.toString() + ')'; *]
        | 'sin' f      [* %% = 'Math.sin(' + %2.toString() + ')'; *]
        | 'cos' f      [* %% = 'Math.cos(' + %2.toString() + ')'; *]
        | 'tan' f      [* %% = 'Math.tan(' + %2.toString() + ')'; *]
        | 'exp' f      [* %% = 'Math.exp(' + %2.toString() + ')'; *]
        | 'log' f      [* %% = 'Math.log(' + %2.toString() + ')'; *]
        | INT
        | FLOAT
        | PI           [* %% = 'Math.PI'; *]
        | E            [* %% = 'Math.E'; *]
        | X
        ;